What Size Combi Boiler do you need ?

To work out what size combi is right for your house you have two options. You can either keep the same size
as your existing boiler (assuming you are happy with its performance) or you can refer to the table below.
Bear in mind that the table is only a guide as room sizes can vary dramatically and a two bedroom house may
be larger than some three bedroom properties.




Property Size
Suitable Boilers
1 Bedroom and 1 bathroom
Worcester 24i Junior, Worcester 25si, Ideal Logic +24,
Vaillant Ecotec +824, Baxi Platinum 24
2 Bedrooms and 1 bathroom
Worcester 24i Junior, Worcester 25si, Worcester 28CDi Compact,
Ideal Logic +24,
Vaillant Ecotec +824, Baxi Platinum 24
3 Bedrooms and 1 bathroom
Worcester 28i Junior, Worcester 25si, Worcester 28CDi Compact,
Worcester 29CDi Classic

Ideal Logic +30, Vaillant Ecotec +831, Baxi Platinum 28
4+ bedrooms and 1 bathroom
Worcester 34CDi Classic, Worcester 36CDi Compact,
Worcester 38CDi Classic,
Ideal Logic +35
Vaillant Ecotec +837, Baxi Platinum 33
2-3 Bedrooms, 1 bathroom
and a shower room
Worcester 30si, Worcester 32CDi Compact,
Worcester 34CDi Classic
,
Ideal Logic +35
Vaillant Ecotec +831, Baxi Platinum 33
4 Bedrooms, 1 bathroom
and a shower room
Worcester 38CDi Classic, Worcester 42CDi Classic,
Ideal Logic +35,
Vaillant Ecotec +837,
Baxi Platinum 40
5+ Bedrooms, 1 bathroom
and a shower room
Worcester 440CDi Highflow, Worcester 42CDi Classic,
Ideal Logic +35
,
Vaillant Ecotec +837, Baxi Platinum 40
Any number of bedrooms and 2 bathrooms
Worcester 440CDi, Worcester 42CDi Classic, Ideal Logic +35,
Vaillant Ecotec +937, Baxi Platinum 40